Detective Conan Drama Special 1: The Letter of Challenge (2006)

Plot

A young detective faces a daunting challenge when a sinister letter arrives, threatening the safety of his classmates. Determined to maintain his reputation as the High School Detective, he dives into a web of intrigue and danger. As he investigates the ominous warning, the stakes rise, and the threat of kidnapping looms closer. With sharp wit and keen observation, he must unravel the mystery before it's too late, all while navigating the complexities of teenage life. Can he outsmart the antagonist and safeguard those he cares about?